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Chapter 4: Problem 26
A cereal box says "net weight 340 grams." What's the actual weight (a) in SI units and (b) in ounces?
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Starting from rest and undergoing constant acceleration, a \(940-\mathrm{kg}\) racing car covers \(400 \mathrm{m}\) in 4.95 s. Find the force on the car.
Does a body necessarily move in the direction of the net force acting on it?
A mass \(M\) hangs from a uniform rope of length \(L\) and mass \(m\) Find an expression for the rope tension as a function of the distance \(y\) measured downward from the top of the rope.
A \(74-\mathrm{kg}\) tree surgeon rides a "cherry picker" lift to reach the upper branches of a tree. What force does the lift exert on the surgeon when it's (a) at rest; (b) moving upward at a steady \(2.4 \mathrm{m} / \mathrm{s}\) (c) moving downward at a steady \(2.4 \mathrm{m} / \mathrm{s} ;\) (d) accelerating upward at \(1.7 \mathrm{m} / \mathrm{s}^{2} ;\) (e) accelerating downward at \(1.7 \mathrm{m} / \mathrm{s}^{2} ?\)
A spring with spring constant \(k=340 \mathrm{N} / \mathrm{m}\) is used to weigh a 6.7-kg fish. How far does the spring stretch?
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